Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Fri Jun 12 00:22:14 2026 Auto Mode Machine = Linux oleg426-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg426-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 1556 7517 608965 188798 64 8 2359 8628 771797 695778 64 16 1580 13481 444572 245190 64 32 2620 34209 1304314 1033216 64 64 3154 46211 1679761 1526887 128 4 5562 12396 299792 468553 128 8 4848 10043 612303 809997 128 16 3145 35078 1130717 410512 128 32 5739 34104 1346196 1130717 128 64 7588 40391 1455701 1000121 128 128 8605 81321 1152564 1727352 256 4 6051 9016 185261 617161 256 8 4801 20401 137857 561343 256 16 6186 6234 577962 257257 256 32 5944 26981 1340826 1254656 256 64 6594 33516 392620 703721 256 128 9587 72624 1561112 1642294 256 256 9618 22400 1817419 1445521 512 4 2805 4941 363130 288260 512 8 8736 18138 621413 240835 512 16 17850 12585 244037 448344 512 32 11342 18714 698412 468902 512 64 17928 49622 1257451 416598 512 128 11152 24298 1585086 1199171 512 256 16930 51251 1433753 1672748 512 512 7647 61568 1365383 2116152 1024 4 3439 4312 234751 168669 1024 8 7143 8787 374132 207028 1024 16 7324 11008 772364 962391 1024 32 9764 30845 803878 577528 1024 64 14963 18735 823136 1199106 1024 128 16498 34790 1556257 201539 1024 256 20021 64180 1481633 1444266 1024 512 16903 44636 995171 1668074 2048 4 2809 5735 365905 212250 2048 8 7184 7236 482911 335468 2048 16 12250 11299 360439 296462 2048 32 13404 20762 599738 339364 2048 64 25823 32517 704277 652839 2048 128 31220 40231 415257 207012 2048 256 49690 33620 750421 1428131 2048 512 46469 89816 432986 846982 4096 4 3771 5176 100180 159780 4096 8 8964 7785 519927 280031 4096 16 18014 16326 277884 392900 4096 32 26120 22935 430661 324694 4096 64 30202 33367 569760 316045 4096 128 33089 40982 307558 722912 4096 256 35910 65097 460329 397665 4096 512 1719 37648 446441 290987 8192 4 4824 5272 268132 192544 8192 8 8794 7645 314993 280933 8192 16 14390 14097 592043 789574 8192 32 16489 20917 322061 361453 8192 64 31890 20240 590883 533711 8192 128 30673 38032 339903 469294 8192 256 42323 50091 1129778 435491 8192 512 31463 38478 595563 958248 16384 4 4793 4485 339770 218712 16384 8 11913 11968 248370 315460 16384 16 16942 24858 430624 202503 16384 32 30050 21345 792870 555767 16384 64 22688 38623 878543 703416 16384 128 27284 27086 627381 468515 16384 256 23563 29777 1089871 314912 16384 512 26376 39528 1075913 736363 32768 4 5912 6444 467713 364932 32768 8 10070 12861 414481 378811 32768 16 15811 21733 415521 541601 32768 32